The principle of car refrigerator
Do you know that some semiconductor materials with a certain voltage, in its pn junction at both ends will have a huge temperature difference? People are using this temperature difference effect, invented a portable or car refrigerator. But the efficiency of the semiconductor refrigerator is not high enough, so the high-end point of the car still use a small refrigerator or air conditioning, refrigerator dual-use compressor refrigerator.
Car refrigerator is the principle of working with the semiconductor cooling, small size, low weight, no noise, easy to carry, but the temperature can be reduced to about 4 degrees Celsius, generally only for cold storage. In addition, if the power supply can be connected to heat.
